Re: [boost] Is there BOOST_ENABLE_IF macro now?

Subject: Re: [boost] Is there BOOST_ENABLE_IF macro now?
From: Matt Calabrese (rivorus_at_[hidden])
Date: 2013-08-18 15:41:51

There is a more up-to-date version of the ENABLE_IF family of macros in the
boost sandbox (the enable_if directory). There is some brief (poor)
quickbook-generated documentation that I wrote up that is also in the
sandbox in the same directory, though I don't have it uploaded anywhere
right now. In addition to the traditional enable_if functionality, there
are also macros for expression-validity testing.

Mathias, do you have any reason for the assertion that it's "unnecessarily
inefficient" at compile time? Please post a comparison of compile-times and
I'll optimize if necessary. Otherwise, for now I'd say just use the macros
when you can and use std::enable_if or boost::enable_if if you have to.
I've pretty much just used the macros for the past year or so.

- Matt Calabrese

On Sun, Aug 18, 2013 at 1:53 PM, Mathias Gaunard <
mathias.gaunard_at_[hidden]> wrote:

> On 18/08/13 18:48, TONGARI J wrote:
>
>  I should refer to this:
>>
>> http://lists.boost.org/**Archives/boost/2011/08/184468.**php
>

>>
>> Of course it's for C++11 only...
>>
>
> Yes I've seen this. It's limited in somewhat unexpected ways, requires a
> lot of C++11 features to be correctly implemented, and also is
> unnecessarily inefficient at compile-time.
>
> I see no compelling advantage to using it instead of less obscure, more
> flexible, more portable and more efficient solutions.
>
>
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-- 
-Matt Calabrese